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Sunday, 29 November 2015

On this day - Lt Gen Raj Kadyan

Don't let difficulties cause undue anxiety; it is only in the darkest nights that stars shine more brightly.

On this day 29Nov....

1775 - Sir James Jay invents invisible ink. (Invisible ink, also known as security ink, is a substance used for writing, which is invisible either on application or soon thereafter, and can later be made visible by some means. Invisible ink is one form of steganography).

1814 - The Times in London became the first newpaper to be printed by steam power. Its hand presses were replaced by new machines invented by Friedrich Koenig and Andreas Bauer. The replacement of hand presses by the new technology meant that for the first time it became possible to produce newspapers on a scale that could meet public demand.

1870 - Compulsory education proclaimed in England.

1877 - Thomas Edison demonstrated his hand-cranked phonograph that recorded sound onto tinfoil cylinders. Although 12 Aug 1877, is often given as the date of this invention, it may have been only at the stage of a sketch. The idea came to Edison while working on a telegraph transmitter, when he noted that when the the tape of the machine was played at high speed, it gave off a noise resembling spoken words. After experimenting with a needle attached to the diaphragm of a telephone receiver to prick paper tape to record a message, his idea evolved to using a stylus on a tinfoil cylinder.

1910 - The first US patent for a traffic signal was issued to Ernest E. Sirrine for a "Street Traffic System" . (The true origins of traffic control are unknown but historical evidence has proven that traffic problems started when highways came into existence. Some of the first strategies for traffic control were not a device but regulations made by governments. One of the earliest examples was in Rome. During the days of Julius Caesar the streets of Rome were so clogged with chariots the government made certain areas off limits to all vehicles. The best historical example of traffic control that relates towards a traffic light is the use of traffic cops to control the flow of traffic on London Bridge in 1722. The first traffic control device that was not human nor an act of regulation appeared in 1868 in London outside the House of Parliament. The device had lights and it used arms which extended outwards. It was operated manually by a police officer. After only a month of use the device exploded and injured the police officer who was operating the light).

1944 - The first “blue baby” operation was performed successfully at Johns Hopkins University by Dr. Alfred Blalock and pediatric cardiologist Helen B. Taussig. (The infant had a hole in the wall between the heart's two major chambers (ventricles). The Blalock-Taussig shunt procedure joined an artery leaving the heart to an artery leading to the lungs, in an attempt to give the blood a second chance at oxygenation. Thousands of cyanotic children have been helped by the same operation until later surgeries repair the defect itself).

1945 - a Sikorsky R5 helicopter performed the first rescue from a sinking civilian vessel and the first use of a rescue winch.

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